LPUSHX

Push an element at the head of the list only if the list exists.

Arguments

key

string

required

The key of the list.

elements

...TValue[]

required

One or more elements to push at the head of the list.

Response

The length of the list after the push operation.

0 if the list did not exist and thus no element was pushed.

Example

await redis.lpush("key", "a", "b", "c"); 
const length = await redis.lpushx("key", "d"); 
console.log(length); // 4